Administrator’s Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
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IP Phone Model
Firmware Name
Example
CP920
78.x.x.x.rom
78.84.0.80.rom
Firmware Upgrade Configuration
Before upgrading firmware, you need to know the following:
l
Do not close and refresh the browser when the device is upgrading firmware via the web user interface.
l
Do not unplug the network cables and power cables when the device is upgrading firmware.
The following table lists the parameters you can use to upgrade firmware.
Parameter
static.firmware.url
<y0000000000xx>.cfg
Description
It configures the access URL of the firmware file.
Permitted
Values
URL within 511 characters
Default
Blank
Web UI
T57W/T54W/T53W/T53/T48U/T46U/T43U/T42U:
Settings > Upgrade > Upgrade Firmware
Other Phones:
Settings > Upgrade > Select And Upgrade Firmware